Sand-strainer for deep wells



(No Model.)

J1 HI SAND STRAINER FOR DEEP WELLS.

No. 478,061. Patented June Z8, 1892.

F'l E I.

950/024 KM 3 1 /4; WWW

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UNITED I STATES PA' NT F JOHN H. KING, or CINCINNATI, orno, ASSIGNOR or ONE-HALF TO nnns w. DUGAN, OFOOVINGTON, KENTUCKY.

SAND-STRAINER FOR DEE-7P WELLS.

SPECIFICATION forming part of Letters Patent No. 478,061, dated June 28, 1892.

' Application filed March 21, 1892- Serial No. 425,699. (No model.)

To all whom it may concern: Referring. to the drawings, in which like Be it known that I, JOHN H. KING, a citiparts are indicated by similar reference-letzen of the United States, and a resident of ters Wherever they occur throughout the va- (Jincinnathin the county of Hamilton and rious views, Figure '1 is a diametrical longi- 55 5 State of Ohio, have invented certain new and tu'dinal sectional View of my strainer, taken useful Improvements in Sand -Strainers for through line 0c of Fig. 2. Fig. 2 is a trans- Deep W'ells, of which the following is a speciverse sectional view taken, through line y y fication. of Fig. 1. Fig. 3.is an edge elevation of one The object of my invention is to produce a of the segments of which my strainer is com- 6o 1 I0 cheap and durable strainer for deep wells. posed. Fig. 4 is aperipheral elevation of the In wells of this class it is necessary to exclude same. Fig. 5 is acentral transverse sectional the very fine grains of sand from the wellview of one form 'of the segment;

tube to prevent them from cutting the pump, The frame of my strainer is composed of cylinders, and pistons, and also to prevent two tubes A and B, T or channel-iron bars 0, 6 5

:5 them from cutting and enlarging the perforauniting-the two tubes, and strengthening rings tions in the strainer. The perforations in the or hoops D, of the same diameter as the tubes strainer must, therefore, be very fine, (at least A B, upon which the bars 0 are firmly seone-thousandth part of an inch,) and the macured, as they are to the tubes A 'B. The terial from which the strainer is constructed tubes AB are exteriorly screw-threaded from 70 must be very hard to prevent the perforatheir ends to the ends of the barsO, which tions from being enlarged by the exceedinglyare riveted to them, the lower one A to refine particles of sand which it is impossible ceive the cap E, in the bottom of which is to exclude and admit water, and the shell of fitted the customary bail e for convenience in the strainer must also have considerable body withdrawing the strainer, and the upper one 75 to resist the pressure brought upon it by the B to receive the interiorlyscrew threaded exhausting suction of the pump. I have tube F. The segments or ribs G, Istamp out found by experience that it is impossible to to the general form shown in Fig. 3 from a economically slot or perforate metal hard sheet of hard -rolled gun metal, phosphorenough and thick enough to resist the abradbronze, or aluminum-bronze. The thickness Sc 0 ing effect of the sand-loaded water for any of the sheet is from one-sixteenth to threeconsiderable length of time, and it is a very sixteenths of an inch. After the pieces are expensive and troublesome operation to restamped to the general form I stamp in suitmove a worn strainer and replace it by a new able dies a depressiongin the central portion one. I have also found that when these old of the rib, either upon one or both sides, leav- 85 strainers are removed only a comparatively ing shoulders 9', so that when the ribs are small portion of the perforations have been placed one upon the other, as seen in Fig. 1,

cut out, while the greater portions are injured very slight slots or openings are left between but slightly; but the whole strainer'is worththe adjacent segments. Instead of forming less, as there is no means of repairing it. By the single depression in one edge, as shown, 90

40 means of my invention Iproduceavery strong one or both edges of the segments may have durable strainer, of the hardest non-corrodi semicircular depressions or grooves'stamped ble material, made in readily-removable secin them to form small openings when they are tions, and without the use of saws, millingplaced together edge to edge, "and when exheads, or other perforating or puncturing eeedinglyfine openingsare required these de- 5 5 tools, which strainer completely overcomes pressions may be made at an angle to the the defects in prior devices. The means by radii of the shell, as seen at 9. Fig. 2, and at which I accomplish these results I will first opposite, angles upon the upper and lower describe in connection with the aecompanyedges, so that a great number of very fine ing drawings, so as to enable any one to make perforations may be made in the shell of the too and use the same. I will then specifically strainer without weakening it. In strainers point out and claim my invention. which are perforated or slotted there must be at least threesixteenths of an inch of metal left between the slots or perforations, and small parallel-sided perforations cannot be made through metal one-eighth of an inch thick without great loss from the breaking of cutting-tools. While my ribs may bemade of any width desired," Iprefer tomake them from one-fourth to three-eighths of an inch in width. After the T-iron bars 0. are secured on the tubes A B and hoops D the channels c are planed true to receive the segments G. The lower cap E is then screwed onto the tube A, the segments G slipped to place one upon the other from the top, and the tube F screwed to place over the tube B and down upon the segments, seating them firmly in their grooves c and holding them in place.

If it is desired tomake the openingslarger upon the inside than the outside of the shell, this may be accomplished by stampingthe segments Vf-"shaped upon the inner edge, as seen at 9 Fig. 5. This construction is also employed when very fine perforations one three-thousandth part of an inch or lessare desired.

In some situations it isv very difficult and often'impossible to remove cylindrical strainers, and as all strainers are made of drawn tubing they are necessarily cylindrical; but with my construction the strainer may be made tapering from top to bottom. In such case the tube A and capEare-made of less diameter than the tubes B andF and the lower hoop D less than the upper one. bars 0 should also be made heavier, so that the channels 0 maybe cut deeper at the bottom to bring the bottom wallstof the adjacent channels parallel toadmit sections of the same length.

The principaladvantage of my invention is in dispensing. with the labor of perforating and slotting .thestrainer-shell and employing harderand stronger material for the strainer than it is possible to perforate.

lar form of segments shown, nor to the spe- Th e I do not, therefore, desire to be limited to the particucific means shown and described for holding the segments together, as it is obvious that many mere mechanical changes may be made in both without departing from the spirit or scope of my invention. For instance, if the bars 0 are made heavy enough the strengtlr ening-hoops D may be omitted.

What I claim as new, and desire to secure by Letters Patent, is

1. A strainer for deep wells, composed of "separate segmentalpieces of hard non-cor- .rodible metal, the edges of said pieces being formed to leave strainer-openings between "the separate pieces when clamped together and the whole forming a strainer-shell sub- ..stantially cylindrical, substantially as shown and described. v a 2. The combination of the frame composed lot the tubes A B and channeled bars 0, the leap E upontube A, the separate segments G, placed in the channels of bars (3,-and the tube {F to clamp the segments between it and the leap E, substantially as shown and'described. f 3."lhe combination of the tubes A B, the jichanneled bars 0, uniting said tubes,and the thoops D, secured to the channel-bars, the cap 'jE upon tube A, the segments G, depressed ,f upon one edge and adapted to fitin the channels of bars 0, and the tube F, screwed upon tube B to hold the segments in place, substantially as and for the purpose specified.

I; 4. The combination, in-a deep-well strainer, of the tubes A B, externally screw-threaded, lffthe bars 0, uniting said tubes and having Etheir opposite edges provided with channels lie, the screw-threaded cap E, screwed upon vZtube-A against the ends of bars 0, the seg- ,ments G, fitted in the channels 0, the inter- ,gn ally-screw-threaded tube F to force and hold fsaid segments in place, and the hoops D, se-

:lcured to the base of bars C, substantially as fland for the purpose set forth.

" JOHN H. KING.

Witnesses:

GEo. B. PARKINsoN, GEO. J. MURRAY. 

